Revert "Fix JMS integration tests"

The change didn't fix the underlying issue. Looking at CI it even seems
to have made it worse.

See gh-1549

Author: snicoll

spring-ws-support/src/test/java/org/springframework/ws/transport/jms/JmsMessageSenderIntegrationTests.java

@@ -43,7 +43,6 @@
 import org.springframework.jms.annotation.EnableJms;
 import org.springframework.jms.annotation.JmsListener;
 import org.springframework.jms.config.DefaultJmsListenerContainerFactory;
-import org.springframework.jms.connection.SingleConnectionFactory;
 import org.springframework.jms.core.BrowserCallback;
 import org.springframework.jms.core.JmsTemplate;
 import org.springframework.jms.core.MessagePostProcessor;
@@ -247,8 +246,8 @@ Object handleRequest(jakarta.jms.Message message) {
 	static class JmsBrokerConfig {
 
 		@Bean
-		SingleConnectionFactory connectionFactory() {
-			return new SingleConnectionFactory(new ActiveMQConnectionFactory("vm://localhost?broker.persistent=false"));
+		ActiveMQConnectionFactory connectionFactory() {
+			return new ActiveMQConnectionFactory("vm://localhost?broker.persistent=false");
 		}
 
 		@Bean